The 320,000 British and French troops successfully crossed the Strait after the Dunkirk retreat, which greatly preserved their effective strength and left the most precious resources for the comprehensive counterattack of the allied forces in the future, that is, hundreds of thousands of experienced military soldiers. The success of Dunkirk's retreat directly led to the success of 1944 landing in Normandy, which provided a huge strategic guarantee for opening up the second battlefield in Europe. The battlefields of World War II are almost all over the world, and the number of countries actively or passively participating in the war is also a precedent in human history. The tragic war cannot be fully expressed by the catastrophe of all mankind.
Secondly, Germany's ambition at that time was considerable, not only because it was hostile to Britain, but also because Germany's attitude towards Britain was vacillating. Germany believes that its real opponent should be the Soviet Union in the East. After basically controlling the whole of Western Europe and sorting out the countries that can resist, the German base camp immediately began to prepare for the Barbarossa Plan. The deployment of troops in western Europe was not maximized, which was not enough to attack Britain. And there is a bay of water between Britain and France, which is the English Channel. If the Germans want to break into England, they must cross this bay. Germany also knows this key point, so it will not take such a big risk.
No one was the real winner in World War II, and the biggest loser was the common people. The number of ordinary people who died in World War II is distressing and shocking.